Shaft-adjustment device



Jan. 29, 1924.y

. DRAKE SHAFT ADJUSTMENT DEVICE Filed Feb. l0. 1922 I u 31a/@antec ,18 Cizazea Zz'ale Patented J an. 29, V1924.

UNITED srAras CHARLS BRAKE, 0F EUDORA., KANSAS.

SHAFT-ADJUSTMENT DEVICE.

Application `1ed February 10, 1922. Serial No. 535,531.

To all whom t may concern.'

Be 1t known that l CHARLES DRAKE reg siding at hudora, county or Douglas, tate of Kansas, a citizen of the United States have invented certain new and useful Improvements in Shaft-Adjustment Devices, of which the following is a specification.

This invention relates to attachments for crank shafts and has particular relation to taking up end play thereof.

wear on the bearings of crank shafts causes them to have end play'which in turn causes the engine to be noisy. In order to cure this defect, it is necessary to take the engine down and replace theworn bearings by new ones. rlhis causes great expense and loss of time.

The primary object of my invention is to' provide a device which may be attached to the end of the crank shaft and which will serve to take up this wear without the necessity of taking down the engine and which will also serve as a pulle for the fan.

Another and further o ject is the provision of such a take up device that has provision for further taking up the end play in crank shafts when additional wear takes lace. P Other and further objects will be apparent from the specification and claims.

' Referring to the drawing Where a. preferred embodiment of my invention is illustrated,

Fig. 1 is a cross sectional view showing a section of my attachment along the line 1 1 of Fig. 2.

Fig. 2 is a front elevation of my attach-l ment.

Fig. 3 is a view similar to` Figure 2 but with the adjusting nut removed. i

Fig. 1 is aV cross section on the line 4-4 of Fig. 2.

The same reference characters refer to similar parts throughout the several views.

10 designates the crank shaft of an engine, 11 the engine frame in which it has bearings, 12 designates the main body or rotatable member of this embodiment of my invention. On the outside'of the member 12 is a surface 13 which may be used as a surface for contact of the fan belt.

14 and l5 designate opposite portions of a thrust bea-ring having balls 16 therebetween movably held in the retainer 17. Ex-

tending through holes 18 in the member 12 areA push pins 19. The inner ends of the pins 19 are in position to engage the bearing member 15 as shown in Fig. 1. The outer ends ofthe pins 19 are engaged by a nut 20 which has a threaded engagement with a corresponding thread on the member l2.

"Thisfnut 20 has openings 21 for the insertion of a Spanner wrench and is provided on nits outer periphery with openingsv 22 to receive a detent 23 shown in Fig. 3. ln the ordinary engine construction, slight r The member 12 yis secured on the shaft l0 'by means of a pin 24 which is in turn prevented from movement by ther insertion of a split cotter 25. The periphery of the outer surface 13 is cut away as indicated at 26 and 27 to receive the ends of the cotter 25.

ing the crank of the engine. i

In attaching my invention to an already constructed engine, the cranking pin would first be removed. The bearings would then be slipped over the shaft. The member 12 would then be placed over the end of the shaft and the pin 24 driven therethrough and also through the hole in the shaft formerly occupied by the cranking pin. The push vpins 19 would be then placed in the holes 18; after which the adjustable nut 20 would be screwed on until a point was reached where the end play was taken up by the thrust bearings. The spring detent 23 is now permitted to enter oneof the holes 22 to hold the nut against accidental turning. The cranking pin 28 is now driven into its hole. This completes the assembling operation. 1f at a later time it is desired to take up further end play, it is only neces sary to hold the spring detent 23 away from the openings 22 and turn the nut 2O until the pins 19 force the member 12 out and thus draw the shaft 10 to its outer position.

While I have described an embodiment of my invention in detail, I desire to have it understood that I do not limit myself to the exact construction shown and described but that modiications and changes may be made without departing from the spirit of my invention and within the scope of the appended claims.

Having described my invention, what I claim is 1. An attachment for a prising a rotatable pulley member securing means for holding the pulley member on the crank shaft, a thrust bearing, means coactcrank shaft com-y ing between the thrust bearingand the pulley member and movable in the direotion of the shaft axis for limiting the movement of the crank shaft in an endwise direction;

2. An attachment for a crank shaft com- I prising a rotatable ,pulley member, securing means for holding thel pulley member on the crank shaft, a thrust bearing, adjusting members movable axially relative to the pulley member and for causing the pulley member to occupy any one of a plurality of positions relative to the thrust bearing.

3. in attachment for a crank shaft oomprising a rotatable member, securing means for holding therotatableA member on the crank shalt, ak thrust bearing,A push pins' passing through the rotatable `member and engaging the" thrust bearing, means for simultaneously moving and for holding the push pins in any one of' several adjusted f positions.

s and in position'to'hold the push pins in adj usted position. Y

5. An attachment for a crank shaft comprising a belt pulley, a pin for holding the pulley in position on the crank shaft, a

thrustfbearingpush pins passing throughu the pulley and in position to engage the thrust bearing, anut having threaded engagementwith the pulley and in position to holdtlie pushupinsin adjusted position, the pulley being proyided With al cranking( pin.

, In testimony Whereofl hereunto aiX my signature. e Y .CHARLES BRAKE. 

